PDF malware analysis — malicious · 09a058bc68e46fe6

MALICIOUS

PDF

3.2 KB

MD5: 268771e92751c34add97b39c50491d06 SHA-1: 16fe0048331e7d01afc82faeda181728b0d506a6 SHA-256: 09a058bc68e46fe68f69a312c77fc457215f1bc0705267094e933a65bcbc7ec0

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that utilizes an unescape function to decode a payload. The script then attempts to execute this decoded content, indicating an exploit designed to run arbitrary code. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a PDF exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `ce494cb5bccac4cad615216bc8355de8ff6b8be4fde0bd25ccbf7a3550a8610d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C8	460 bytes

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